For those that are Sirius about their audio the A91 features a 5 way hybrid driver design.
The Fidue Sirius A91 features a 5-way hybrid driver technology combining both dynamic and armature designs.
The Fidue Sirius A91 features 4 hi-end balanced armature drivers which ensure high-definition resolution resulting in lively instruments and voices and high levels of separation and detail.
A single customised bass dynamic driver will surpass conventional armature-only bass diving ability making music fuller and extended so you won’t miss out on low frequencies.
3D acoustic cavity coil design creates suitable voice space for the voice attributes of every unit by means of delicate 3D analysis.
Full-frequency fractional frequency tuning makes 5 high-quality drivers with different attributes combine perfectly.
Lower internal resistance 8 cores silver plating balance cable
Original 2.5mm quadrupole balanced designed plug
Tougher all-metal shell
The fourth generation MMCX locking design
Excellent wearing design to be more supra-aural
More stable over-ear-style sport wearing
Music flame，completely display